If the cancer is not clinically significant, then its not life-altering information.
Essentially they are saying that many of these diagnoses are potentially false positives. To the point where detecting them might be more harmful then not. Keep in mind most cancer treatments are pretty harsh. They are better than cancer, but if you don't have clinically significant cancer then the treatments can be very not worth it.
Then here's an idea: instead of hiding that information, you can explain it to the patient.
You have no authority to treat your patient like a child.
Yes, this is true even if the person opting for the elective surgery has millions, potentially even billions of dollars to pay with. Having money doesn't make your illness more important.
Don't get all holier-than-thou on topics like this; it's already a difficult-enough topic.
Strawman+ad hominem. No one is suggesting to pretend _anything_. Charge premiums for these tests based on how "unimportant" they are. Use market forces to move money from those willing to pay, to those who cannot.